The British Drilling Association (BDA) is the UK's trade association for the ground drilling industry. The BDA is a membership organisation for those who drill holes in the ground, manufacture / supply drilling rigs & equipment, or have a general or real interest in ground drilling. Whether it's mineral exploration; water-well activities; ground investigation; geotechnical processes; quarry drilling; geothermal & ground source heat drilling; directional drilling or other applications, our members cover it all.